Usually produces sev. Compression fracture around the knee can be very painful and very disabling;it either occurs as a plateau fracture or an injry to the patella. In either case it needs to be evaluated by a orthopaedic surgeon.
Let me explain. If you have inch length of bone, and apply compression force on it, that same bone become 1/2 inch in thickness because the unusual pressure applied on it. That should be corrected mostly by surgery.
Depends. Compression fractures cause problems when there are deep, greater than 1cm and when the knee also has ligament injury or abnormal alignment.